Re: BPF_MISC+BPF_COP and BPF_COPX

On Aug 8, 2013, at 1:14 AM, Darren Reed <darrenr%netbsd.org@localhost> wrote:
> A BPF program generated on Linux is just as valid as on Solaris or NetBSD.
Not necessarily - negative offsets in load and store instructions are supported
on Linux to access some metadata that's not in the packet data, but those
aren't, as far as I know, supported on other platforms.
However, there is a subset of BPF that all kernel BPF implementations, and the
userland implementation in libpcap, support.